Fix stress test: move reset_test_data() outside loop

- Move reset_test_data() and error count resets outside the main loop
- This prevents sent_count from being reset each iteration
- The test was incorrectly resetting counters for each packet, causing sent_count to always be 1

tests/test_pkt_normalizer.c

@@ -290,11 +290,11 @@ static int test_stress_random(pkt_normalizer_pair* pair) {
     
     /* Часть 1: 10000 случайных пакетов без изменения размера фрагмента */
     printf("Sending %d random packets...\n", NUM_PACKETS);
-    for (int i = 0; i < NUM_PACKETS; i++) {
     reset_test_data();
     pkt_normalizer_reset_error_count(pair->packer);
     pkt_normalizer_reset_error_count(pair->unpacker);
     
+    for (int i = 0; i < NUM_PACKETS; i++) {
         /* Случайный размер пакета от 0 до MAX_PACKET_SIZE */
         size_t size = rand() % (MAX_PACKET_SIZE + 1);